The Utgarde Catacombs (at 56,49) basement is wonderful for Devouring Maggot collection, if you did not already pick up your rare as a secondary while collecting in Howling Fjord. Surrounded by rapidly respawning zombies (AOE at 85+). As a druid you can stealth in and start the pet battle. Feel free to kill the Devouring Maggots that are not rare, stealth again and grab the respawn - they respawn pretty fast, you won't wait often if you are clearing the floor of pets.

I used the Left skull catacombsentrance and went straight to the bottom zombie pit, The zombies were annoying but not much of a hinderance, first 5 and 7th and 9th were grey or white quality the 6th 8th and 10th were green. 11th was my blue :D

Try and clear both rooms and behind the stairs. Behind the stairs you will get the "Pet battle obstructed" error, but perseverance pays off in the end.

BEST PLACE FOR THESE IS THE UTGARD CATACOMBS! (easy way in is be on the south side of Utagrad and there is a right skull and a left skull cave entrance go in the LEFT SKULL!) If you are ~85+ then just go in kill a few so you are standing off to the side not in the pat of these fast respawning mobs but close enough to click on the D-maggot and click and battle. Some are in obscurred fight areas so just move around or on to the next one.

A great place to level up our pets is Westguard Keep in Howling Fjord, if you are Alliance. There are many pets and a stable master for repairs. Devoring maggot will show up as secondary pet. Mine has not given me credit toward the achieve yet. Another fix-it for Blizzard.

I trapped the normal, common and uncommon quality Devouring Maggot and none counted towards the achievement. It'll probably be one of those things that needs fixing... I also found them in the Fjord Worg Pups...

At the moment, this pet is bugged, and doesn't show toward the achievement. However, it is also not yet needed for the achievement: I have the Northrend achievement as we speak.

These can show up as secondaries to almost anything in the zone. On my hunt for the elusive rare, I have located spawns with the primaries of Maggot, Fjord Rat, Rat, Rabbit, and Fjord Worg Pup. And that's only so far. I expect they can join as part of almost anything.

Took a few tries and a few accidental kills, but I got my rare tonight in the catacombs just after 1am (server) right by the pile of bones in the west hallway. It was the last pet I needed for Northrend Safari :D

Utgarde Catacombs is definitely the best place to find this pet, though it requires alot of time and patience. My best advice would be to take a high enough level Night Elf Hunter, as you have the option to shadowmeld or feign death right by one that you can battle and stay hidden so that you can do so without having all of the zombies on you leaving you in combat and unable to fight.

The catacombs is the place to go, if you are high enough. I was fine as a 75 pally tank. The hardest part is getting an unobstructed view and out of combat at the same time. Once you figure out a technique that works for you, you never have to leave as they respawn quick enough. Be patient, took me about an hour or so.

Thank you for the hint about Utgard Catacombs. I got one there tonight, and finally got credit on the Northrend Safari (this was my third time collecting the devouring maggot). Apparently Blizzard has fixed the achievement bug!

I just confirm Kobh info - a really easy place to farm these is the UTGARD CATACOMBS. As long as you are 85+ you can survive in there indefinately. Much easier for those of us with spec that let you deal with multiple mobs at one time. I used chain lightening. becasue the spawn rate is so fast it took me 10mins to get a rare.

I tried using the friends method but I only got grays... so I thought to try the catacombs. Stood on the step and AOE'ed the first 3 gouls. then I grabbed the first D.Maggot which was rare. I tried 2 others which were uncommon (logged out and left for others). This seemed to be a better spot than hoping a 'friend' would be a D.Maggot if you want better quality.